src/Network/Probe.php

   1 <?php
   2
   3 namespace Friendica\Network;
   4
   5 /**
   6  * @file src/Network/Probe.php
   7  * @brief Functions for probing URL
   8  *
   9  */
  10
  11 use Friendica\App;
  12 use Friendica\Core\Config;
  13 use Friendica\Core\PConfig;
  14
  15 require_once 'include/feed.php';
  16 require_once 'include/email.php';
  17 require_once 'include/network.php';
  18
  19 /**
  20  * @brief This class contain functions for probing URL
  21  *
  22  */
  23 class Probe {
  24
  25         private static $baseurl;
  26
  27         /**
  28          * @brief Rearrange the array so that it always has the same order
  29          *
  30          * @param array $data Unordered data
  31          *
  32          * @return array Ordered data
  33          */
  34         private function rearrangeData($data) {
  35                 $fields = array("name", "nick", "guid", "url", "addr", "alias",
  36                                 "photo", "community", "keywords", "location", "about",
  37                                 "batch", "notify", "poll", "request", "confirm", "poco",
  38                                 "priority", "network", "pubkey", "baseurl");
  39
  40                 $newdata = array();
  41                 foreach ($fields as $field) {
  42                         if (isset($data[$field])) {
  43                                 $newdata[$field] = $data[$field];
  44                         } else {
  45                                 $newdata[$field] = "";
  46                         }
  47                 }
  48
  49                 // We don't use the "priority" field anymore and replace it with a dummy.
  50                 $newdata["priority"] = 0;
  51
  52                 return $newdata;
  53         }
  54
  55         /**
  56          * @brief Probes for XRD data
  57          *
  58          * @param string $host The host part of an url
  59          *
  60          * @return array
  61          *      'lrdd' => Link to LRDD endpoint
  62          *      'lrdd-xml' => Link to LRDD endpoint in XML format
  63          *      'lrdd-json' => Link to LRDD endpoint in JSON format
  64          */
  65         private function xrd($host) {
  66
  67                 // Reset the static variable
  68                 self::$baseurl = '';
  69
  70                 $ssl_url = "https://".$host."/.well-known/host-meta";
  71                 $url = "http://".$host."/.well-known/host-meta";
  72
  73                 $xrd_timeout = Config::get('system', 'xrd_timeout', 20);
  74                 $redirects = 0;
  75
  76                 $ret = z_fetch_url($ssl_url, false, $redirects, array('timeout' => $xrd_timeout, 'accept_content' => 'application/xrd+xml'));
  77                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
  78                         return false;
  79                 }
  80                 $xml = $ret['body'];
  81
  82                 $xrd = parse_xml_string($xml, false);
  83
  84                 if (!is_object($xrd)) {
  85                         $ret = z_fetch_url($url, false, $redirects, array('timeout' => $xrd_timeout, 'accept_content' => 'application/xrd+xml'));
  86                         if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
  87                                 return false;
  88                         }
  89                         $xml = $ret['body'];
  90                         $xrd = parse_xml_string($xml, false);
  91                 }
  92                 if (!is_object($xrd)) {
  93                         return false;
  94                 }
  95
  96                 $links = \xml::element_to_array($xrd);
  97                 if (!isset($links["xrd"]["link"])) {
  98                         return false;
  99                 }
 100
 101                 $xrd_data = array();
 102
 103                 foreach ($links["xrd"]["link"] as $value => $link) {
 104                         if (isset($link["@attributes"])) {
 105                                 $attributes = $link["@attributes"];
 106                         } elseif ($value == "@attributes") {
 107                                 $attributes = $link;
 108                         } else {
 109                                 continue;
 110                         }
 111
 112                         if (($attributes["rel"] == "lrdd") AND
 113                                 ($attributes["type"] == "application/xrd+xml")) {
 114                                 $xrd_data["lrdd-xml"] = $attributes["template"];
 115                         } elseif (($attributes["rel"] == "lrdd") AND
 116                                 ($attributes["type"] == "application/json")) {
 117                                 $xrd_data["lrdd-json"] = $attributes["template"];
 118                         } elseif ($attributes["rel"] == "lrdd") {
 119                                 $xrd_data["lrdd"] = $attributes["template"];
 120                         }
 121                 }
 122
 123                 self::$baseurl = "http://".$host;
 124
 125                 return $xrd_data;
 126         }
 127
 128         /**
 129          * @brief Perform Webfinger lookup and return DFRN data
 130          *
 131          * Given an email style address, perform webfinger lookup and
 132          * return the resulting DFRN profile URL, or if no DFRN profile URL
 133          * is located, returns an OStatus subscription template (prefixed
 134          * with the string 'stat:' to identify it as on OStatus template).
 135          * If this isn't an email style address just return $webbie.
 136          * Return an empty string if email-style addresses but webfinger fails,
 137          * or if the resultant personal XRD doesn't contain a supported
 138          * subscription/friend-request attribute.
 139          *
 140          * amended 7/9/2011 to return an hcard which could save potentially loading
 141          * a lengthy content page to scrape dfrn attributes
 142          *
 143          * @param string $webbie Address that should be probed
 144          * @param string $hcard Link to the hcard - is returned by reference
 145          *
 146          * @return string profile link
 147          */
 148
 149         public static function webfingerDfrn($webbie, &$hcard) {
 150
 151                 $profile_link = '';
 152
 153                 $links = self::lrdd($webbie);
 154                 logger('webfingerDfrn: '.$webbie.':'.print_r($links, true), LOGGER_DATA);
 155                 if (count($links)) {
 156                         foreach ($links as $link) {
 157                                 if ($link['@attributes']['rel'] === NAMESPACE_DFRN) {
 158                                         $profile_link = $link['@attributes']['href'];
 159                                 }
 160                                 if (($link['@attributes']['rel'] === NAMESPACE_OSTATUSSUB) AND ($profile_link == "")) {
 161                                         $profile_link = 'stat:'.$link['@attributes']['template'];
 162                                 }
 163                                 if ($link['@attributes']['rel'] === 'http://microformats.org/profile/hcard') {
 164                                         $hcard = $link['@attributes']['href'];
 165                                 }
 166                         }
 167                 }
 168                 return $profile_link;
 169         }
 170
 171         /**
 172          * @brief Check an URI for LRDD data
 173          *
 174          * this is a replacement for the "lrdd" function in include/network.php.
 175          * It isn't used in this class and has some redundancies in the code.
 176          * When time comes we can check the existing calls for "lrdd" if we can rework them.
 177          *
 178          * @param string $uri Address that should be probed
 179          *
 180          * @return array uri data
 181          */
 182         public static function lrdd($uri) {
 183
 184                 $lrdd = self::xrd($uri);
 185
 186                 if (!$lrdd) {
 187                         $parts = @parse_url($uri);
 188                         if (!$parts) {
 189                                 return array();
 190                         }
 191
 192                         $host = $parts["host"];
 193                         if (isset($parts["port"])) {
 194                                 $host .= ':'.$parts["port"];
 195                         }
 196
 197                         $path_parts = explode("/", trim($parts["path"], "/"));
 198
 199                         $nick = array_pop($path_parts);
 200
 201                         do {
 202                                 $lrdd = self::xrd($host);
 203                                 $host .= "/".array_shift($path_parts);
 204                         } while (!$lrdd AND (sizeof($path_parts) > 0));
 205                 }
 206
 207                 if (!$lrdd) {
 208                         return array();
 209                 }
 210
 211                 foreach ($lrdd as $key => $link) {
 212                         if ($webfinger) {
 213                                 continue;
 214                         }
 215
 216                         if (!in_array($key, array("lrdd", "lrdd-xml", "lrdd-json"))) {
 217                                 continue;
 218                         }
 219
 220                         $path = str_replace('{uri}', urlencode($uri), $link);
 221                         $webfinger = self::webfinger($path);
 222
 223                         if (!$webfinger AND (strstr($uri, "@"))) {
 224                                 $path = str_replace('{uri}', urlencode("acct:".$uri), $link);
 225                                 $webfinger = self::webfinger($path);
 226                         }
 227
 228                         // Special treatment for Mastodon
 229                         // Problem is that Mastodon uses an URL format like http://domain.tld/@nick
 230                         // But the webfinger for this format fails.
 231                         if (!$webfinger AND isset($nick)) {
 232                                 // Mastodon uses a "@" as prefix for usernames in their url format
 233                                 $nick = ltrim($nick, '@');
 234
 235                                 $addr = $nick."@".$host;
 236
 237                                 $path = str_replace('{uri}', urlencode("acct:".$addr), $link);
 238                                 $webfinger = self::webfinger($path);
 239                         }
 240                 }
 241
 242                 if (!is_array($webfinger["links"])) {
 243                         return false;
 244                 }
 245
 246                 $data = array();
 247
 248                 foreach ($webfinger["links"] as $link) {
 249                         $data[] = array("@attributes" => $link);
 250                 }
 251
 252                 if (is_array($webfinger["aliases"])) {
 253                         foreach ($webfinger["aliases"] as $alias) {
 254                                 $data[] = array("@attributes" =>
 255                                                         array("rel" => "alias",
 256                                                                 "href" => $alias));
 257                         }
 258                 }
 259
 260                 return $data;
 261         }
 262
 263         /**
 264          * @brief Fetch information (protocol endpoints and user information) about a given uri
 265          *
 266          * @param string $uri Address that should be probed
 267          * @param string $network Test for this specific network
 268          * @param integer $uid User ID for the probe (only used for mails)
 269          * @param boolean $cache Use cached values?
 270          *
 271          * @return array uri data
 272          */
 273         public static function uri($uri, $network = "", $uid = 0, $cache = true) {
 274
 275                 if ($cache) {
 276                         $result = \Cache::get("probe_url:".$network.":".$uri);
 277                         if (!is_null($result)) {
 278                                 return $result;
 279                         }
 280                 }
 281
 282                 if ($uid == 0) {
 283                         $uid = local_user();
 284                 }
 285
 286                 $data = self::detect($uri, $network, $uid);
 287
 288                 if (!isset($data["url"])) {
 289                         $data["url"] = $uri;
 290                 }
 291
 292                 if ($data["photo"] != "") {
 293                         $data["baseurl"] = matching_url(normalise_link($data["baseurl"]), normalise_link($data["photo"]));
 294                 } else {
 295                         $data["photo"] = App::get_baseurl().'/images/person-175.jpg';
 296                 }
 297
 298                 if (!isset($data["name"]) OR ($data["name"] == "")) {
 299                         if (isset($data["nick"])) {
 300                                 $data["name"] = $data["nick"];
 301                         }
 302
 303                         if ($data["name"] == "") {
 304                                 $data["name"] = $data["url"];
 305                         }
 306                 }
 307
 308                 if (!isset($data["nick"]) OR ($data["nick"] == "")) {
 309                         $data["nick"] = strtolower($data["name"]);
 310
 311                         if (strpos($data['nick'], ' ')) {
 312                                 $data['nick'] = trim(substr($data['nick'], 0, strpos($data['nick'], ' ')));
 313                         }
 314                 }
 315
 316                 if (self::$baseurl != "") {
 317                         $data["baseurl"] = self::$baseurl;
 318                 }
 319
 320                 if (!isset($data["network"])) {
 321                         $data["network"] = NETWORK_PHANTOM;
 322                 }
 323
 324                 $data = self::rearrangeData($data);
 325
 326                 // Only store into the cache if the value seems to be valid
 327                 if (!in_array($data['network'], array(NETWORK_PHANTOM, NETWORK_MAIL))) {
 328                         \Cache::set("probe_url:".$network.":".$uri, $data, CACHE_DAY);
 329
 330                         /// @todo temporary fix - we need a real contact update function that updates only changing fields
 331                         /// The biggest problem is the avatar picture that could have a reduced image size.
 332                         /// It should only be updated if the existing picture isn't existing anymore.
 333                         if (($data['network'] != NETWORK_FEED) AND ($mode == PROBE_NORMAL) AND
 334                                 $data["name"] AND $data["nick"] AND $data["url"] AND $data["addr"] AND $data["poll"]) {
 335                                 q("UPDATE `contact` SET `name` = '%s', `nick` = '%s', `url` = '%s', `addr` = '%s',
 336                                                 `notify` = '%s', `poll` = '%s', `alias` = '%s', `success_update` = '%s'
 337                                         WHERE `nurl` = '%s' AND NOT `self` AND `uid` = 0",
 338                                         dbesc($data["name"]),
 339                                         dbesc($data["nick"]),
 340                                         dbesc($data["url"]),
 341                                         dbesc($data["addr"]),
 342                                         dbesc($data["notify"]),
 343                                         dbesc($data["poll"]),
 344                                         dbesc($data["alias"]),
 345                                         dbesc(datetime_convert()),
 346                                         dbesc(normalise_link($data['url']))
 347                                 );
 348                         }
 349                 }
 350
 351                 return $data;
 352         }
 353
 354         /**
 355          * @brief Fetch information (protocol endpoints and user information) about a given uri
 356          *
 357          * This function is only called by the "uri" function that adds caching and rearranging of data.
 358          *
 359          * @param string $uri Address that should be probed
 360          * @param string $network Test for this specific network
 361          * @param integer $uid User ID for the probe (only used for mails)
 362          *
 363          * @return array uri data
 364          */
 365         private function detect($uri, $network, $uid) {
 366                 $parts = parse_url($uri);
 367
 368                 if (isset($parts["scheme"]) AND isset($parts["host"]) AND isset($parts["path"])) {
 369                         $host = $parts["host"];
 370                         if (isset($parts["port"])) {
 371                                 $host .= ':'.$parts["port"];
 372                         }
 373
 374                         if ($host == 'twitter.com') {
 375                                 return array("network" => NETWORK_TWITTER);
 376                         }
 377                         $lrdd = self::xrd($host);
 378
 379                         $path_parts = explode("/", trim($parts["path"], "/"));
 380
 381                         while (!$lrdd AND (sizeof($path_parts) > 1)) {
 382                                 $host .= "/".array_shift($path_parts);
 383                                 $lrdd = self::xrd($host);
 384                         }
 385                         if (!$lrdd) {
 386                                 return self::feed($uri);
 387                         }
 388                         $nick = array_pop($path_parts);
 389
 390                         // Mastodon uses a "@" as prefix for usernames in their url format
 391                         $nick = ltrim($nick, '@');
 392
 393                         $addr = $nick."@".$host;
 394
 395                 } elseif (strstr($uri, '@')) {
 396                         // If the URI starts with "mailto:" then jump directly to the mail detection
 397                         if (strpos($url, 'mailto:') !== false) {
 398                                 $uri = str_replace('mailto:', '', $url);
 399                                 return self::mail($uri, $uid);
 400                         }
 401
 402                         if ($network == NETWORK_MAIL) {
 403                                 return self::mail($uri, $uid);
 404                         }
 405                         // Remove "acct:" from the URI
 406                         $uri = str_replace('acct:', '', $uri);
 407
 408                         $host = substr($uri, strpos($uri, '@') + 1);
 409                         $nick = substr($uri, 0, strpos($uri, '@'));
 410
 411                         if (strpos($uri, '@twitter.com')) {
 412                                 return array("network" => NETWORK_TWITTER);
 413                         }
 414                         $lrdd = self::xrd($host);
 415
 416                         if (!$lrdd) {
 417                                 return self::mail($uri, $uid);
 418                         }
 419                         $addr = $uri;
 420
 421                 } else {
 422                         return false;
 423                 }
 424
 425                 $webfinger = false;
 426
 427                 /// @todo Do we need the prefix "acct:" or "acct://"?
 428
 429                 foreach ($lrdd as $key => $link) {
 430                         if ($webfinger) {
 431                                 continue;
 432                         }
 433                         if (!in_array($key, array("lrdd", "lrdd-xml", "lrdd-json"))) {
 434                                 continue;
 435                         }
 436                         // At first try it with the given uri
 437                         $path = str_replace('{uri}', urlencode($uri), $link);
 438                         $webfinger = self::webfinger($path);
 439
 440                         // We cannot be sure that the detected address was correct, so we don't use the values
 441                         if ($webfinger AND ($uri != $addr)) {
 442                                 $nick = "";
 443                                 $addr = "";
 444                         }
 445
 446                         // Try webfinger with the address (user@domain.tld)
 447                         if (!$webfinger) {
 448                                 $path = str_replace('{uri}', urlencode($addr), $link);
 449                                 $webfinger = self::webfinger($path);
 450                         }
 451
 452                         // Mastodon needs to have it with "acct:"
 453                         if (!$webfinger) {
 454                                 $path = str_replace('{uri}', urlencode("acct:".$addr), $link);
 455                                 $webfinger = self::webfinger($path);
 456                         }
 457                 }
 458                 if (!$webfinger) {
 459                         return self::feed($uri);
 460                 }
 461
 462                 $result = false;
 463
 464                 logger("Probing ".$uri, LOGGER_DEBUG);
 465
 466                 if (in_array($network, array("", NETWORK_DFRN))) {
 467                         $result = self::dfrn($webfinger);
 468                 }
 469                 if ((!$result AND ($network == "")) OR ($network == NETWORK_DIASPORA)) {
 470                         $result = self::diaspora($webfinger);
 471                 }
 472                 if ((!$result AND ($network == "")) OR ($network == NETWORK_OSTATUS)) {
 473                         $result = self::ostatus($webfinger);
 474                 }
 475                 if ((!$result AND ($network == "")) OR ($network == NETWORK_PUMPIO)) {
 476                         $result = self::pumpio($webfinger);
 477                 }
 478                 if ((!$result AND ($network == "")) OR ($network == NETWORK_FEED)) {
 479                         $result = self::feed($uri);
 480                 } else {
 481                         // We overwrite the detected nick with our try if the previois routines hadn't detected it.
 482                         // Additionally it is overwritten when the nickname doesn't make sense (contains spaces).
 483                         if ((!isset($result["nick"]) OR ($result["nick"] == "") OR (strstr($result["nick"], " "))) AND ($nick != "")) {
 484                                 $result["nick"] = $nick;
 485                         }
 486
 487                         if ((!isset($result["addr"]) OR ($result["addr"] == "")) AND ($addr != "")) {
 488                                 $result["addr"] = $addr;
 489                         }
 490                 }
 491
 492                 logger($uri." is ".$result["network"], LOGGER_DEBUG);
 493
 494                 if (!isset($result["baseurl"]) OR ($result["baseurl"] == "")) {
 495                         $pos = strpos($result["url"], $host);
 496                         if ($pos) {
 497                                 $result["baseurl"] = substr($result["url"], 0, $pos).$host;
 498                         }
 499                 }
 500
 501                 return $result;
 502         }
 503
 504         /**
 505          * @brief Perform a webfinger request.
 506          *
 507          * For details see RFC 7033: <https://tools.ietf.org/html/rfc7033>
 508          *
 509          * @param string $url Address that should be probed
 510          *
 511          * @return array webfinger data
 512          */
 513         private function webfinger($url) {
 514
 515                 $xrd_timeout = Config::get('system', 'xrd_timeout', 20);
 516                 $redirects = 0;
 517
 518                 $ret = z_fetch_url($url, false, $redirects, array('timeout' => $xrd_timeout, 'accept_content' => 'application/xrd+xml'));
 519                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
 520                         return false;
 521                 }
 522                 $data = $ret['body'];
 523
 524                 $xrd = parse_xml_string($data, false);
 525
 526                 if (!is_object($xrd)) {
 527                         // If it is not XML, maybe it is JSON
 528                         $webfinger = json_decode($data, true);
 529
 530                         if (!isset($webfinger["links"])) {
 531                                 return false;
 532                         }
 533
 534                         return $webfinger;
 535                 }
 536
 537                 $xrd_arr = \xml::element_to_array($xrd);
 538                 if (!isset($xrd_arr["xrd"]["link"])) {
 539                         return false;
 540                 }
 541
 542                 $webfinger = array();
 543
 544                 if (isset($xrd_arr["xrd"]["subject"])) {
 545                         $webfinger["subject"] = $xrd_arr["xrd"]["subject"];
 546                 }
 547
 548                 if (isset($xrd_arr["xrd"]["alias"])) {
 549                         $webfinger["aliases"] = $xrd_arr["xrd"]["alias"];
 550                 }
 551
 552                 $webfinger["links"] = array();
 553
 554                 foreach ($xrd_arr["xrd"]["link"] as $value => $data) {
 555                         if (isset($data["@attributes"])) {
 556                                 $attributes = $data["@attributes"];
 557                         } elseif ($value == "@attributes") {
 558                                 $attributes = $data;
 559                         } else {
 560                                 continue;
 561                         }
 562
 563                         $webfinger["links"][] = $attributes;
 564                 }
 565                 return $webfinger;
 566         }
 567
 568         /**
 569          * @brief Poll the Friendica specific noscrape page.
 570          *
 571          * "noscrape" is a faster alternative to fetch the data from the hcard.
 572          * This functionality was originally created for the directory.
 573          *
 574          * @param string $noscrape Link to the noscrape page
 575          * @param array $data The already fetched data
 576          *
 577          * @return array noscrape data
 578          */
 579         private function pollNoscrape($noscrape, $data) {
 580                 $ret = z_fetch_url($noscrape);
 581                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
 582                         return false;
 583                 }
 584                 $content = $ret['body'];
 585                 if (!$content) {
 586                         return false;
 587                 }
 588
 589                 $json = json_decode($content, true);
 590                 if (!is_array($json)) {
 591                         return false;
 592                 }
 593
 594                 if (isset($json["fn"])) {
 595                         $data["name"] = $json["fn"];
 596                 }
 597
 598                 if (isset($json["addr"])) {
 599                         $data["addr"] = $json["addr"];
 600                 }
 601
 602                 if (isset($json["nick"])) {
 603                         $data["nick"] = $json["nick"];
 604                 }
 605
 606                 if (isset($json["comm"])) {
 607                         $data["community"] = $json["comm"];
 608                 }
 609
 610                 if (isset($json["tags"])) {
 611                         $keywords = implode(" ", $json["tags"]);
 612                         if ($keywords != "") {
 613                                 $data["keywords"] = $keywords;
 614                         }
 615                 }
 616
 617                 $location = formatted_location($json);
 618                 if ($location) {
 619                         $data["location"] = $location;
 620                 }
 621
 622                 if (isset($json["about"])) {
 623                         $data["about"] = $json["about"];
 624                 }
 625
 626                 if (isset($json["key"])) {
 627                         $data["pubkey"] = $json["key"];
 628                 }
 629
 630                 if (isset($json["photo"])) {
 631                         $data["photo"] = $json["photo"];
 632                 }
 633
 634                 if (isset($json["dfrn-request"])) {
 635                         $data["request"] = $json["dfrn-request"];
 636                 }
 637
 638                 if (isset($json["dfrn-confirm"])) {
 639                         $data["confirm"] = $json["dfrn-confirm"];
 640                 }
 641
 642                 if (isset($json["dfrn-notify"])) {
 643                         $data["notify"] = $json["dfrn-notify"];
 644                 }
 645
 646                 if (isset($json["dfrn-poll"])) {
 647                         $data["poll"] = $json["dfrn-poll"];
 648                 }
 649
 650                 return $data;
 651         }
 652
 653         /**
 654          * @brief Check for valid DFRN data
 655          *
 656          * @param array $data DFRN data
 657          *
 658          * @return int Number of errors
 659          */
 660         public static function validDfrn($data) {
 661                 $errors = 0;
 662                 if (!isset($data['key'])) {
 663                         $errors ++;
 664                 }
 665                 if (!isset($data['dfrn-request'])) {
 666                         $errors ++;
 667                 }
 668                 if (!isset($data['dfrn-confirm'])) {
 669                         $errors ++;
 670                 }
 671                 if (!isset($data['dfrn-notify'])) {
 672                         $errors ++;
 673                 }
 674                 if (!isset($data['dfrn-poll'])) {
 675                         $errors ++;
 676                 }
 677                 return $errors;
 678         }
 679
 680         /**
 681          * @brief Fetch data from a DFRN profile page and via "noscrape"
 682          *
 683          * @param string $profile Link to the profile page
 684          *
 685          * @return array profile data
 686          */
 687         public static function profile($profile) {
 688
 689                 $data = array();
 690
 691                 logger("Check profile ".$profile, LOGGER_DEBUG);
 692
 693                 // Fetch data via noscrape - this is faster
 694                 $noscrape = str_replace(array("/hcard/", "/profile/"), "/noscrape/", $profile);
 695                 $data = self::pollNoscrape($noscrape, $data);
 696
 697                 if (!isset($data["notify"]) OR !isset($data["confirm"]) OR
 698                         !isset($data["request"]) OR !isset($data["poll"]) OR
 699                         !isset($data["poco"]) OR !isset($data["name"]) OR
 700                         !isset($data["photo"])) {
 701                         $data = self::pollHcard($profile, $data, true);
 702                 }
 703
 704                 $prof_data = array();
 705                 $prof_data["addr"] = $data["addr"];
 706                 $prof_data["nick"] = $data["nick"];
 707                 $prof_data["dfrn-request"] = $data["request"];
 708                 $prof_data["dfrn-confirm"] = $data["confirm"];
 709                 $prof_data["dfrn-notify"] = $data["notify"];
 710                 $prof_data["dfrn-poll"] = $data["poll"];
 711                 $prof_data["dfrn-poco"] = $data["poco"];
 712                 $prof_data["photo"] = $data["photo"];
 713                 $prof_data["fn"] = $data["name"];
 714                 $prof_data["key"] = $data["pubkey"];
 715
 716                 logger("Result for profile ".$profile.": ".print_r($prof_data, true), LOGGER_DEBUG);
 717
 718                 return $prof_data;
 719         }
 720
 721         /**
 722          * @brief Check for DFRN contact
 723          *
 724          * @param array $webfinger Webfinger data
 725          *
 726          * @return array DFRN data
 727          */
 728         private function dfrn($webfinger) {
 729
 730                 $hcard = "";
 731                 $data = array();
 732                 foreach ($webfinger["links"] as $link) {
 733                         if (($link["rel"] == NAMESPACE_DFRN) AND ($link["href"] != "")) {
 734                                 $data["network"] = NETWORK_DFRN;
 735                         } elseif (($link["rel"] == NAMESPACE_FEED) AND ($link["href"] != "")) {
 736                                 $data["poll"] = $link["href"];
 737                         } elseif (($link["rel"] == "http://webfinger.net/rel/profile-page") AND ($link["type"] == "text/html") AND ($link["href"] != "")) {
 738                                 $data["url"] = $link["href"];
 739                         } elseif (($link["rel"] == "http://microformats.org/profile/hcard") AND ($link["href"] != "")) {
 740                                 $hcard = $link["href"];
 741                         } elseif (($link["rel"] == NAMESPACE_POCO) AND ($link["href"] != "")) {
 742                                 $data["poco"] = $link["href"];
 743                         } elseif (($link["rel"] == "http://webfinger.net/rel/avatar") AND ($link["href"] != "")) {
 744                                 $data["photo"] = $link["href"];
 745                         } elseif (($link["rel"] == "http://joindiaspora.com/seed_location") AND ($link["href"] != "")) {
 746                                 $data["baseurl"] = trim($link["href"], '/');
 747                         } elseif (($link["rel"] == "http://joindiaspora.com/guid") AND ($link["href"] != "")) {
 748                                 $data["guid"] = $link["href"];
 749                         } elseif (($link["rel"] == "diaspora-public-key") AND ($link["href"] != "")) {
 750                                 $data["pubkey"] = base64_decode($link["href"]);
 751
 752                                 //if (strstr($data["pubkey"], 'RSA ') OR ($link["type"] == "RSA"))
 753                                 if (strstr($data["pubkey"], 'RSA ')) {
 754                                         $data["pubkey"] = rsatopem($data["pubkey"]);
 755                                 }
 756                         }
 757                 }
 758
 759                 if (!isset($data["network"]) OR ($hcard == "")) {
 760                         return false;
 761                 }
 762
 763                 // Fetch data via noscrape - this is faster
 764                 $noscrape = str_replace("/hcard/", "/noscrape/", $hcard);
 765                 $data = self::pollNoscrape($noscrape, $data);
 766
 767                 if (isset($data["notify"]) AND isset($data["confirm"]) AND isset($data["request"]) AND
 768                         isset($data["poll"]) AND isset($data["name"]) AND isset($data["photo"])) {
 769                         return $data;
 770                 }
 771
 772                 $data = self::pollHcard($hcard, $data, true);
 773
 774                 return $data;
 775         }
 776
 777         /**
 778          * @brief Poll the hcard page (Diaspora and Friendica specific)
 779          *
 780          * @param string $hcard Link to the hcard page
 781          * @param array $data The already fetched data
 782          * @param boolean $dfrn Poll DFRN specific data
 783          *
 784          * @return array hcard data
 785          */
 786         private function pollHcard($hcard, $data, $dfrn = false) {
 787                 $ret = z_fetch_url($hcard);
 788                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
 789                         return false;
 790                 }
 791                 $content = $ret['body'];
 792                 if (!$content) {
 793                         return false;
 794                 }
 795
 796                 $doc = new \DOMDocument();
 797                 if (!@$doc->loadHTML($content)) {
 798                         return false;
 799                 }
 800
 801                 $xpath = new \DomXPath($doc);
 802
 803                 $vcards = $xpath->query("//div[contains(concat(' ', @class, ' '), ' vcard ')]");
 804                 if (!is_object($vcards)) {
 805                         return false;
 806                 }
 807
 808                 if ($vcards->length > 0) {
 809                         $vcard = $vcards->item(0);
 810
 811                         // We have to discard the guid from the hcard in favour of the guid from lrdd
 812                         // Reason: Hubzilla doesn't use the value "uid" in the hcard like Diaspora does.
 813                         $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' uid ')]", $vcard); // */
 814                         if (($search->length > 0) AND ($data["guid"] == "")) {
 815                                 $data["guid"] = $search->item(0)->nodeValue;
 816                         }
 817
 818                         $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' nickname ')]", $vcard); // */
 819                         if ($search->length > 0) {
 820                                 $data["nick"] = $search->item(0)->nodeValue;
 821                         }
 822
 823                         $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' fn ')]", $vcard); // */
 824                         if ($search->length > 0) {
 825                                 $data["name"] = $search->item(0)->nodeValue;
 826                         }
 827
 828                         $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' searchable ')]", $vcard); // */
 829                         if ($search->length > 0) {
 830                                 $data["searchable"] = $search->item(0)->nodeValue;
 831                         }
 832
 833                         $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' key ')]", $vcard); // */
 834                         if ($search->length > 0) {
 835                                 $data["pubkey"] = $search->item(0)->nodeValue;
 836                                 if (strstr($data["pubkey"], 'RSA ')) {
 837                                         $data["pubkey"] = rsatopem($data["pubkey"]);
 838                                 }
 839                         }
 840
 841                         $search = $xpath->query("//*[@id='pod_location']", $vcard); // */
 842                         if ($search->length > 0) {
 843                                 $data["baseurl"] = trim($search->item(0)->nodeValue, "/");
 844                         }
 845                 }
 846
 847                 $avatar = array();
 848                 $photos = $xpath->query("//*[contains(concat(' ', @class, ' '), ' photo ') or contains(concat(' ', @class, ' '), ' avatar ')]", $vcard); // */
 849                 foreach ($photos as $photo) {
 850                         $attr = array();
 851                         foreach ($photo->attributes as $attribute) {
 852                                 $attr[$attribute->name] = trim($attribute->value);
 853                         }
 854
 855                         if (isset($attr["src"]) AND isset($attr["width"])) {
 856                                 $avatar[$attr["width"]] = $attr["src"];
 857                         }
 858
 859                         // We don't have a width. So we just take everything that we got.
 860                         // This is a Hubzilla workaround which doesn't send a width.
 861                         if ((sizeof($avatar) == 0) AND isset($attr["src"])) {
 862                                 $avatar[] = $attr["src"];
 863                         }
 864                 }
 865
 866                 if (sizeof($avatar)) {
 867                         ksort($avatar);
 868                         $data["photo"] = self::fixAvatar(array_pop($avatar), $data["baseurl"]);
 869                 }
 870
 871                 if ($dfrn) {
 872                         // Poll DFRN specific data
 873                         $search = $xpath->query("//link[contains(concat(' ', @rel), ' dfrn-')]");
 874                         if ($search->length > 0) {
 875                                 foreach ($search as $link) {
 876                                         //$data["request"] = $search->item(0)->nodeValue;
 877                                         $attr = array();
 878                                         foreach ($link->attributes as $attribute) {
 879                                                 $attr[$attribute->name] = trim($attribute->value);
 880                                         }
 881
 882                                         $data[substr($attr["rel"], 5)] = $attr["href"];
 883                                 }
 884                         }
 885
 886                         // Older Friendica versions had used the "uid" field differently than newer versions
 887                         if ($data["nick"] == $data["guid"]) {
 888                                 unset($data["guid"]);
 889                         }
 890                 }
 891
 892
 893                 return $data;
 894         }
 895
 896         /**
 897          * @brief Check for Diaspora contact
 898          *
 899          * @param array $webfinger Webfinger data
 900          *
 901          * @return array Diaspora data
 902          */
 903         private function diaspora($webfinger) {
 904
 905                 $hcard = "";
 906                 $data = array();
 907                 foreach ($webfinger["links"] as $link) {
 908                         if (($link["rel"] == "http://microformats.org/profile/hcard") AND ($link["href"] != "")) {
 909                                 $hcard = $link["href"];
 910                         } elseif (($link["rel"] == "http://joindiaspora.com/seed_location") AND ($link["href"] != "")) {
 911                                 $data["baseurl"] = trim($link["href"], '/');
 912                         } elseif (($link["rel"] == "http://joindiaspora.com/guid") AND ($link["href"] != "")) {
 913                                 $data["guid"] = $link["href"];
 914                         } elseif (($link["rel"] == "http://webfinger.net/rel/profile-page") AND ($link["type"] == "text/html") AND ($link["href"] != "")) {
 915                                 $data["url"] = $link["href"];
 916                         } elseif (($link["rel"] == NAMESPACE_FEED) AND ($link["href"] != "")) {
 917                                 $data["poll"] = $link["href"];
 918                         } elseif (($link["rel"] == NAMESPACE_POCO) AND ($link["href"] != "")) {
 919                                 $data["poco"] = $link["href"];
 920                         } elseif (($link["rel"] == "salmon") AND ($link["href"] != "")) {
 921                                 $data["notify"] = $link["href"];
 922                         } elseif (($link["rel"] == "diaspora-public-key") AND ($link["href"] != "")) {
 923                                 $data["pubkey"] = base64_decode($link["href"]);
 924
 925                                 //if (strstr($data["pubkey"], 'RSA ') OR ($link["type"] == "RSA"))
 926                                 if (strstr($data["pubkey"], 'RSA ')) {
 927                                         $data["pubkey"] = rsatopem($data["pubkey"]);
 928                                 }
 929                         }
 930                 }
 931
 932                 if (!isset($data["url"]) OR ($hcard == "")) {
 933                         return false;
 934                 }
 935
 936                 if (is_array($webfinger["aliases"])) {
 937                         foreach ($webfinger["aliases"] as $alias) {
 938                                 if (normalise_link($alias) != normalise_link($data["url"]) AND ! strstr($alias, "@")) {
 939                                         $data["alias"] = $alias;
 940                                 }
 941                         }
 942                 }
 943
 944                 // Fetch further information from the hcard
 945                 $data = self::pollHcard($hcard, $data);
 946
 947                 if (!$data) {
 948                         return false;
 949                 }
 950
 951                 if (isset($data["url"]) AND isset($data["guid"]) AND isset($data["baseurl"]) AND
 952                         isset($data["pubkey"]) AND ($hcard != "")) {
 953                         $data["network"] = NETWORK_DIASPORA;
 954
 955                         // The Diaspora handle must always be lowercase
 956                         $data["addr"] = strtolower($data["addr"]);
 957
 958                         // We have to overwrite the detected value for "notify" since Hubzilla doesn't send it
 959                         $data["notify"] = $data["baseurl"] . "/receive/users/" . $data["guid"];
 960                         $data["batch"] = $data["baseurl"] . "/receive/public";
 961                 } else {
 962                         return false;
 963                 }
 964
 965                 return $data;
 966         }
 967
 968         /**
 969          * @brief Check for OStatus contact
 970          *
 971          * @param array $webfinger Webfinger data
 972          *
 973          * @return array OStatus data
 974          */
 975         private function ostatus($webfinger) {
 976                 $data = array();
 977                 if (is_array($webfinger["aliases"])) {
 978                         foreach ($webfinger["aliases"] as $alias) {
 979                                 if (strstr($alias, "@")) {
 980                                         $data["addr"] = str_replace('acct:', '', $alias);
 981                                 }
 982                         }
 983                 }
 984
 985                 if (is_string($webfinger["subject"]) AND strstr($webfinger["subject"], "@")) {
 986                         $data["addr"] = str_replace('acct:', '', $webfinger["subject"]);
 987                 }
 988                 $pubkey = "";
 989                 foreach ($webfinger["links"] as $link) {
 990                         if (($link["rel"] == "http://webfinger.net/rel/profile-page") AND
 991                                 ($link["type"] == "text/html") AND ($link["href"] != "")) {
 992                                 $data["url"] = $link["href"];
 993                         } elseif (($link["rel"] == "salmon") AND ($link["href"] != "")) {
 994                                 $data["notify"] = $link["href"];
 995                         } elseif (($link["rel"] == NAMESPACE_FEED) AND ($link["href"] != "")) {
 996                                 $data["poll"] = $link["href"];
 997                         } elseif (($link["rel"] == "magic-public-key") AND ($link["href"] != "")) {
 998                                 $pubkey = $link["href"];
 999
1000                                 if (substr($pubkey, 0, 5) === 'data:') {
1001                                         if (strstr($pubkey, ',')) {
1002                                                 $pubkey = substr($pubkey, strpos($pubkey, ',') + 1);
1003                                         } else {
1004                                                 $pubkey = substr($pubkey, 5);
1005                                         }
1006                                 } elseif (normalise_link($pubkey) == 'http://') {
1007                                         $ret = z_fetch_url($pubkey);
1008                                         if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
1009                                                 return false;
1010                                         }
1011                                         $pubkey = $ret['body'];
1012                                 }
1013
1014                                 $key = explode(".", $pubkey);
1015
1016                                 if (sizeof($key) >= 3) {
1017                                         $m = base64url_decode($key[1]);
1018                                         $e = base64url_decode($key[2]);
1019                                         $data["pubkey"] = metopem($m, $e);
1020                                 }
1021                         }
1022                 }
1023
1024                 if (isset($data["notify"]) AND isset($data["pubkey"]) AND
1025                         isset($data["poll"]) AND isset($data["url"])) {
1026                         $data["network"] = NETWORK_OSTATUS;
1027                 } else {
1028                         return false;
1029                 }
1030                 // Fetch all additional data from the feed
1031                 $ret = z_fetch_url($data["poll"]);
1032                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
1033                         return false;
1034                 }
1035                 $feed = $ret['body'];
1036                 $feed_data = feed_import($feed, $dummy1, $dummy2, $dummy3, true);
1037                 if (!$feed_data) {
1038                         return false;
1039                 }
1040                 if ($feed_data["header"]["author-name"] != "") {
1041                         $data["name"] = $feed_data["header"]["author-name"];
1042                 }
1043                 if ($feed_data["header"]["author-nick"] != "") {
1044                         $data["nick"] = $feed_data["header"]["author-nick"];
1045                 }
1046                 if ($feed_data["header"]["author-avatar"] != "") {
1047                         $data["photo"] = self::fixAvatar($feed_data["header"]["author-avatar"], $data["url"]);
1048                 }
1049                 if ($feed_data["header"]["author-id"] != "") {
1050                         $data["alias"] = $feed_data["header"]["author-id"];
1051                 }
1052                 if ($feed_data["header"]["author-location"] != "") {
1053                         $data["location"] = $feed_data["header"]["author-location"];
1054                 }
1055                 if ($feed_data["header"]["author-about"] != "") {
1056                         $data["about"] = $feed_data["header"]["author-about"];
1057                 }
1058                 // OStatus has serious issues when the the url doesn't fit (ssl vs. non ssl)
1059                 // So we take the value that we just fetched, although the other one worked as well
1060                 if ($feed_data["header"]["author-link"] != "") {
1061                         $data["url"] = $feed_data["header"]["author-link"];
1062                 }
1063                 /// @todo Fetch location and "about" from the feed as well
1064                 return $data;
1065         }
1066
1067         /**
1068          * @brief Fetch data from a pump.io profile page
1069          *
1070          * @param string $profile Link to the profile page
1071          *
1072          * @return array profile data
1073          */
1074         private function pumpioProfileData($profile) {
1075
1076                 $doc = new \DOMDocument();
1077                 if (!@$doc->loadHTMLFile($profile)) {
1078                         return false;
1079                 }
1080
1081                 $xpath = new \DomXPath($doc);
1082
1083                 $data = array();
1084
1085                 // This is ugly - but pump.io doesn't seem to know a better way for it
1086                 $data["name"] = trim($xpath->query("//h1[@class='media-header']")->item(0)->nodeValue);
1087                 $pos = strpos($data["name"], chr(10));
1088                 if ($pos) {
1089                         $data["name"] = trim(substr($data["name"], 0, $pos));
1090                 }
1091
1092                 $avatar = $xpath->query("//img[@class='img-rounded media-object']")->item(0);
1093                 if ($avatar) {
1094                         foreach ($avatar->attributes as $attribute) {
1095                                 if ($attribute->name == "src") {
1096                                         $data["photo"] = trim($attribute->value);
1097                                 }
1098                         }
1099                 }
1100
1101                 $data["location"] = $xpath->query("//p[@class='location']")->item(0)->nodeValue;
1102                 $data["about"] = $xpath->query("//p[@class='summary']")->item(0)->nodeValue;
1103
1104                 return $data;
1105         }
1106
1107         /**
1108          * @brief Check for pump.io contact
1109          *
1110          * @param array $webfinger Webfinger data
1111          *
1112          * @return array pump.io data
1113          */
1114         private function pumpio($webfinger) {
1115
1116                 $data = array();
1117                 foreach ($webfinger["links"] as $link) {
1118                         if (($link["rel"] == "http://webfinger.net/rel/profile-page") AND
1119                                 ($link["type"] == "text/html") AND ($link["href"] != "")) {
1120                                 $data["url"] = $link["href"];
1121                         } elseif (($link["rel"] == "activity-inbox") AND ($link["href"] != "")) {
1122                                 $data["notify"] = $link["href"];
1123                         } elseif (($link["rel"] == "activity-outbox") AND ($link["href"] != "")) {
1124                                 $data["poll"] = $link["href"];
1125                         } elseif (($link["rel"] == "dialback") AND ($link["href"] != "")) {
1126                                 $data["dialback"] = $link["href"];
1127                         }
1128                 }
1129                 if (isset($data["poll"]) AND isset($data["notify"]) AND
1130                         isset($data["dialback"]) AND isset($data["url"])) {
1131                         // by now we use these fields only for the network type detection
1132                         // So we unset all data that isn't used at the moment
1133                         unset($data["dialback"]);
1134
1135                         $data["network"] = NETWORK_PUMPIO;
1136                 } else {
1137                         return false;
1138                 }
1139
1140                 $profile_data = self::pumpioProfileData($data["url"]);
1141
1142                 if (!$profile_data) {
1143                         return false;
1144                 }
1145
1146                 $data = array_merge($data, $profile_data);
1147
1148                 return $data;
1149         }
1150
1151         /**
1152          * @brief Check page for feed link
1153          *
1154          * @param string $url Page link
1155          *
1156          * @return string feed link
1157          */
1158         private function getFeedLink($url) {
1159                 $doc = new \DOMDocument();
1160
1161                 if (!@$doc->loadHTMLFile($url)) {
1162                         return false;
1163                 }
1164
1165                 $xpath = new \DomXPath($doc);
1166
1167                 //$feeds = $xpath->query("/html/head/link[@type='application/rss+xml']");
1168                 $feeds = $xpath->query("/html/head/link[@type='application/rss+xml' and @rel='alternate']");
1169                 if (!is_object($feeds)) {
1170                         return false;
1171                 }
1172
1173                 if ($feeds->length == 0) {
1174                         return false;
1175                 }
1176
1177                 $feed_url = "";
1178
1179                 foreach ($feeds as $feed) {
1180                         $attr = array();
1181                         foreach ($feed->attributes as $attribute) {
1182                                 $attr[$attribute->name] = trim($attribute->value);
1183                         }
1184
1185                         if ($feed_url == "") {
1186                                 $feed_url = $attr["href"];
1187                         }
1188                 }
1189
1190                 return $feed_url;
1191         }
1192
1193         /**
1194          * @brief Check for feed contact
1195          *
1196          * @param string $url Profile link
1197          * @param boolean $probe Do a probe if the page contains a feed link
1198          *
1199          * @return array feed data
1200          */
1201         private function feed($url, $probe = true) {
1202                 $ret = z_fetch_url($url);
1203                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
1204                         return false;
1205                 }
1206                 $feed = $ret['body'];
1207                 $feed_data = feed_import($feed, $dummy1, $dummy2, $dummy3, true);
1208
1209                 if (!$feed_data) {
1210                         if (!$probe) {
1211                                 return false;
1212                         }
1213
1214                         $feed_url = self::getFeedLink($url);
1215
1216                         if (!$feed_url) {
1217                                 return false;
1218                         }
1219
1220                         return self::feed($feed_url, false);
1221                 }
1222
1223                 if ($feed_data["header"]["author-name"] != "") {
1224                         $data["name"] = $feed_data["header"]["author-name"];
1225                 }
1226
1227                 if ($feed_data["header"]["author-nick"] != "") {
1228                         $data["nick"] = $feed_data["header"]["author-nick"];
1229                 }
1230
1231                 if ($feed_data["header"]["author-avatar"] != "") {
1232                         $data["photo"] = $feed_data["header"]["author-avatar"];
1233                 }
1234
1235                 if ($feed_data["header"]["author-id"] != "") {
1236                         $data["alias"] = $feed_data["header"]["author-id"];
1237                 }
1238
1239                 $data["url"] = $url;
1240                 $data["poll"] = $url;
1241
1242                 if ($feed_data["header"]["author-link"] != "") {
1243                         $data["baseurl"] = $feed_data["header"]["author-link"];
1244                 } else {
1245                         $data["baseurl"] = $data["url"];
1246                 }
1247
1248                 $data["network"] = NETWORK_FEED;
1249
1250                 return $data;
1251         }
1252
1253         /**
1254          * @brief Check for mail contact
1255          *
1256          * @param string $uri Profile link
1257          * @param integer $uid User ID
1258          *
1259          * @return array mail data
1260          */
1261         private function mail($uri, $uid) {
1262
1263                 if (!validate_email($uri)) {
1264                         return false;
1265                 }
1266
1267                 $x = q("SELECT `prvkey` FROM `user` WHERE `uid` = %d LIMIT 1", intval($uid));
1268
1269                 $r = q("SELECT * FROM `mailacct` WHERE `uid` = %d AND `server` != '' LIMIT 1", intval($uid));
1270
1271                 if (\dbm::is_result($x) && \dbm::is_result($r)) {
1272                         $mailbox = construct_mailbox_name($r[0]);
1273                         $password = '';
1274                         openssl_private_decrypt(hex2bin($r[0]['pass']), $password, $x[0]['prvkey']);
1275                         $mbox = email_connect($mailbox, $r[0]['user'], $password);
1276                         if (!mbox) {
1277                                 return false;
1278                         }
1279                 }
1280
1281                 $msgs = email_poll($mbox, $uri);
1282                 logger('searching '.$uri.', '.count($msgs).' messages found.', LOGGER_DEBUG);
1283
1284                 if (!count($msgs)) {
1285                         return false;
1286                 }
1287
1288                 $data = array();
1289
1290                 $data["addr"] = $uri;
1291                 $data["network"] = NETWORK_MAIL;
1292                 $data["name"] = substr($uri, 0, strpos($uri, '@'));
1293                 $data["nick"] = $data["name"];
1294                 $data["photo"] = avatar_img($uri);
1295
1296                 $phost = substr($uri, strpos($uri, '@') + 1);
1297                 $data["url"] = 'http://'.$phost."/".$data["nick"];
1298                 $data["notify"] = 'smtp '.random_string();
1299                 $data["poll"] = 'email '.random_string();
1300
1301                 $x = email_msg_meta($mbox, $msgs[0]);
1302                 if (stristr($x[0]->from, $uri)) {
1303                         $adr = imap_rfc822_parse_adrlist($x[0]->from, '');
1304                 } elseif (stristr($x[0]->to, $uri)) {
1305                         $adr = imap_rfc822_parse_adrlist($x[0]->to, '');
1306                 }
1307                 if (isset($adr)) {
1308                         foreach ($adr as $feadr) {
1309                                 if ((strcasecmp($feadr->mailbox, $data["name"]) == 0)
1310                                         &&(strcasecmp($feadr->host, $phost) == 0)
1311                                         && (strlen($feadr->personal))) {
1312
1313                                         $personal = imap_mime_header_decode($feadr->personal);
1314                                         $data["name"] = "";
1315                                         foreach ($personal as $perspart) {
1316                                                 if ($perspart->charset != "default") {
1317                                                         $data["name"] .= iconv($perspart->charset, 'UTF-8//IGNORE', $perspart->text);
1318                                                 } else {
1319                                                         $data["name"] .= $perspart->text;
1320                                                 }
1321                                         }
1322
1323                                         $data["name"] = notags($data["name"]);
1324                                 }
1325                         }
1326                 }
1327                 imap_close($mbox);
1328
1329                 return $data;
1330         }
1331
1332         /**
1333          * @brief Mix two paths together to possibly fix missing parts
1334          *
1335          * @param string $avatar Path to the avatar
1336          * @param string $base Another path that is hopefully complete
1337          *
1338          * @return string fixed avatar path
1339          */
1340         public static function fixAvatar($avatar, $base) {
1341                 $base_parts = parse_url($base);
1342
1343                 // Remove all parts that could create a problem
1344                 unset($base_parts['path']);
1345                 unset($base_parts['query']);
1346                 unset($base_parts['fragment']);
1347
1348                 $avatar_parts = parse_url($avatar);
1349
1350                 // Now we mix them
1351                 $parts = array_merge($base_parts, $avatar_parts);
1352
1353                 // And put them together again
1354                 $scheme   = isset($parts['scheme']) ? $parts['scheme'] . '://' : '';
1355                 $host     = isset($parts['host']) ? $parts['host'] : '';
1356                 $port     = isset($parts['port']) ? ':' . $parts['port'] : '';
1357                 $path     = isset($parts['path']) ? $parts['path'] : '';
1358                 $query    = isset($parts['query']) ? '?' . $parts['query'] : '';
1359                 $fragment = isset($parts['fragment']) ? '#' . $parts['fragment'] : '';
1360
1361                 $fixed = $scheme.$host.$port.$path.$query.$fragment;
1362
1363                 logger('Base: '.$base.' - Avatar: '.$avatar.' - Fixed: '.$fixed, LOGGER_DATA);
1364
1365                 return $fixed;
1366         }
1367 }